IOS 18 below FFmpeg subtitle synthesis log [Parsed_subtitles_0 @ 0x301b37650] Using font provider fontconfig [Parsed_subtitles_0 @ 0x301b37650] fontselect: (PingFangSC-Semibold, 400, 0) -> /System/Library/Fonts/LanguageSupport/PingFang.ttc, 8, PingFangSC-Semibold IOS 18 FFmpeg subtitle synthesis log [Parsed_subtitles_0 @ 0x303e825d0] Using font provider fontconfig [Parsed_subtitles_0 @ 0x303e825d0] fontselect: (PingFangSC-Regular, 400, 0) -> /System/Library/Fonts/Core/HiraginoKakuGothic.ttc, 10, . HiraKakuInterface-W4 [Parsed_subtitles_0 @ 0x303e825d0] Glyph 0x8FD9 not found, selecting one more font for (PingFangSC-Regular, 400, 0) [Parsed_subtitles_0 @ 0x303e825d0] fontselect: (PingFangSC-Regular, 400, 0) -> /System/Library/Fonts/Core/LastResort.otf, 0, LastResort In normal characters, there may be some garbled characters, such as 0x8FD9 mentioned in the log, corresponding to "这" Traditional Chinese and Simplified Chinese Normal font: Russian, Korean, Japanese, French, English, German IOS 18 below FFmpeg subtitle synthesis log fontselect: (PingFangSC-Semibold, 400, 0) -> /System/Library/Fonts/LanguageSupport/PingFang.ttc, 8, PingFangSC-Semibold IOS 18 FFmpeg subtitle synthesis log fontselect: (PingFangSC-Regular, 400, 0) -> /System/Library/Fonts/Core/HiraginoKakuGothic.ttc, 10, . HiraKakuInterface-W4 In iOS 18, the selected font has changed and instead of continuing to use PingFang.ttc, HiraginoKakuGothic. Has iOS changed the PingFang font directory, causing ffmpeg to be unable to use system fonts for subtitle synthesis

When I use ReplayKit's exportClipToURL function on iOS to capture a 15-second replay, the resulting video quality is poor, with snowy artifacts on the damaged visuals and audio distortion.

Hello I am testing the new Media Extension API in macOS 15 Beta 4. Firstly, THANK YOU FOR THIS API!!!!!! This is going to be huge for the video ecosystem on the platform. Seriously! My understanding is that to support custom container formats you make a MEFormatReader extension, and to support a specific custom codec, you create a MEVideoDecoder for that codec. Ok - I have followed the docs - esp the inline header info and have gotten quite far A Host App which hosts my Media Extenion (MKV files) A Extension Bundle which exposes the UTTYpes it supports to the system and plugin class ID as per the docs Entitlements as per docs I'm building debug - but I have a valid Developer ID / Account associated in Teams in Xcode My Plugin is visible to the Media Extension System preference My Plugin is properly initialized, I get the MEByteReader and can read container level metadata in callbacks I can instantiate my tracks readers, and validate the tracks level information and provide the callbacks I can instantiate my sample cursors, and respond to seek requests for samples for the track in question Now, here is where I get hit some issues. My format reader is leveraging FFMPEGs libavformat library, and I am testing with MKV files which host AVC1 h264 samples, which should be decodable as I understand it out of the box from VideoToolbox (ie, I do not need a separate MEVideoDecoder plugin to handle this format). Here is my CMFormatDescription which I vend from my MKV parser to AVFoundation via the track reader Made Format Description: <CMVideoFormatDescription 0x11f005680 [0x1f7d62220]> { mediaType:'vide' mediaSubType:'avc1' mediaSpecific: { codecType: 'avc1' dimensions: 1920 x 1080 } extensions: {(null)} } My MESampleCursor implementation implements all of the callbacks - and some of the 'optional' sample cursor location methods: (im only sharing the optional ones here) - (MESampleLocation * _Nullable) sampleLocationReturningError:(NSError *__autoreleasing _Nullable * _Nullable) error - (MESampleCursorChunk * _Nullable) chunkDetailsReturningError:(NSError *__autoreleasing _Nullable * _Nullable) error I also populate the AVSampleCursorSyncInfo and AVSampleCursorDependencyInfo structs per each AVPacket* I decode from libavformat Now my issue: I get these log files in my host app: <<<< VRP >>>> figVideoRenderPipelineSetProperty signalled err=-12852 (kFigRenderPipelineError_InvalidParameter) (sample attachment collector not enabled) at FigStandardVideoRenderPipeline.c:2231 <<<< VideoMentor >>>> videoMentorDependencyStateCopyCursorForDecodeWalk signalled err=-12836 (kVideoMentorUnexpectedSituationErr) (Node not found for target cursor -- it should have been created during videoMentorDependencyStateAddSamplesToGraph) at VideoMentor.c:4982 <<<< VideoMentor >>>> videoMentorThreadCreateSampleBuffer signalled err=-12841 (err) (FigSampleGeneratorCreateSampleBufferAtCursor failed) at VideoMentor.c:3960 <<<< VideoMentor >>>> videoMentorThreadCreateSampleBuffer signalled err=-12841 (err) (FigSampleGeneratorCreateSampleBufferAtCursor failed) at VideoMentor.c:3960 Which I presume is telling me I am not providing the GOP or dependency metadata correctly to the plugin. I've included console logs from my extension and host app: LibAVExtension system logs And my SampleCursor implementation is here https://github.com/vade/FFMPEGMediaExtension/blob/main/LibAVExtension/LibAVSampleCursor.m Any guidance is very helpful. Thank you!

I have the following piece of code that works in Swift 5 func test() { let url = Bundle.main.url(forResource: "movie", withExtension: "mov") let videoAsset = AVURLAsset(url: url!) let t1 = CMTime(value: 1, timescale: 1) let t2 = CMTime(value: 4, timescale: 1) let t3 = CMTime(value: 8, timescale: 1) let timesArray = [ NSValue(time: t1), NSValue(time: t2), NSValue(time: t3) ] let generator = AVAssetImageGenerator(asset: videoAsset) generator.requestedTimeToleranceBefore = .zero generator.requestedTimeToleranceAfter = .zero generator.generateCGImagesAsynchronously(forTimes: timesArray ) { requestedTime, image, actualTime, result, error in let img = UIImage(cgImage: image!) } } When I compile and run it in Swift 6 it gives a EXC_BREAKPOINT (code=1, subcode=0x1021c7478) I understand that Swift 6 adopts strict concurrency. My question is if I start porting my code, what is the recommended way to change the above code? Rgds, James

I want my app to allow the user to search for certain words in a video file and the transcript of that video. I found a Transcript class. I don't remember which Framework it is in. Would someone point me in the right direction? What Framework and Classes should I use.

1.在Fxplug4.3的 FxRemoteWindowAPI 的协议中，没有提供window.frame.origin的设置。 2.如果我自定义NSWindow时，在FxPlug中 [Window setLevel:NSFloatingWindowLevel];也没有执行。 3.请问我应该如何把窗口保留在Final cut pro的前面，并且不影响Final cut pro 的操作呢？

We have developed a custom player tvOS application using AVPlayer Foundation. When we hit the Siri command "What did they say?" Playback will go backwards but subtitles will not work temporarily. Anyone please suggest a solution for this issue :)

NSPanel *panel = [[myPanel alloc] initWithContentRect:NSMakeRect(100, 100, 400, 300) styleMask:NSWindowStyleMaskTitled | NSWindowStyleMaskClosable backing:NSBackingStoreBuffered defer:NO]; [panel setLevel:NSFloatingWindowLevel];//无效？？？？ [panel makeKeyAndOrderFront:self]; 问题：在FxPlug4.3中使用setLevel不能将panel放在Final cut pro和Mition的前面？ 救命～～～全世界都没找到答案！

I have the Facebook SDK version 17.0.2 and xcode 15. Sharing photos and links work fine but when I try sharing videos, I get the following error: Failed to log access with error: access=<PATCCAccess 0x301d12b20> accessor:<<PAApplication 0x301d27e30 identifierType:auditToken identifier:{pid:18440, version:47210}>> identifier:A9159DCD-76B1-4C77-A01E-DA611929B50B kind:intervalEvent timestampAdjustment:0 visibilityState:0 assetIdentifierCount:0 accessCount:0 tccService:kTCCServicePhotos, error=Error Domain=NSCocoaErrorDomain Code=4097 "connection to service with pid 15679 named com.apple.privacyaccountingd" UserInfo={NSDebugDescription=connection to service with pid 15679 named com.apple.privacyaccountingd}

I've created a video recorder that records front facing video and depth-camera video at the same time. But as soon as audio is added to AVCaptureSession the depth video capturing stops working. Is there any way to record and save audio, video and depth camera at the same time?

I had no luck to compile a sample code provided by apple with Xcode 16.0 beta 5. ScreenCaptureKit demo (https://developer.apple.com/documentation/screencapturekit/capturing_screen_content_in_macos) The part it is failling is, streamOutput.capturedFrameHandler = { continuation.yield($0) } And the error message is Sending '$0' risks causing data races Task-isolated '$0' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses Please enlighten me why this is an issue and how to avoid? Thanks in advance!

Hello, We are currently developing a mobile game using Unreal Engine 5, and we have encountered an issue where a specific video (mp4 format) stops displaying at a particular frame during playback within the game. The code within Unreal fails at the following point, causing the issue: CMTime OutputItemTime = [Output itemTimeForHostTime:CACurrentMediaTime()]; if (![Output hasNewPixelBufferForItemTime:OutputItemTime]) { return; } We have referred to the following Apple documentation: AVPlayerTimeControlStatus reasonForWaitingToPlay Upon logging, we observed the following: [2024.08.13-05.18.35:266][429]LogTemp: AMP PlayerItem.status AVPlayerItemStatusReadyToPlay [2024.08.13-05.18.35:266][429]LogTemp: AMP MediaPlayer.timeControlStatus AVPlayerTimeControlStatusWaitingToPlayAtSpecifiedRate [2024.08.13-05.18.35:266][429]LogTemp: AMP reasonForWaitingToPlay: AVPlayerWaitingToMinimizeStallsReason [2024.08.13-05.18.35:266][429]LogTemp: AMP MediaPlayer.rate 1.000000 [2024.08.13-05.18.35:268][430]LogTemp: avf CurrentMediaTime : 455097.836833 [2024.08.13-05.18.35:268][430]LogTemp: avf OutputItemTime: 3.868346 [2024.08.13-05.18.35:268][430]LogTemp: avf Sampler::Tick() fail hasNewPixelBufferForItemTime OutputItemTime: 3.868346 This issue consistently occurs with videos that have the following specifications: Codec: H.264 Resolution: 1080x608 Bitrate: 7,922,135 bits/sec Duration: 90.17 seconds Frame Rate: 30.0 fps Pixel Format: yuv420p Profile: Main We would like to inquire about the possible reasons for the playback failure and the recommended MP4 specifications for seamless playback on Apple devices. Specifically, we need guidance on recommended resolution, FPS, profile, level, and bitrate limits. Your assistance would be greatly appreciated.

I am working on a project for a university which wants to alter the passthrough camera feed more so than the standard filters (saturation/contract/etc) that some of the headsets provide. I don't have access to the headset or enterprise SDK yet, as I'd like to nail down whether or not this is feasible before we purchase the hardware. In the API I see I can use CameraFrameProvider to access a CameraFrame and then grab a sample. The sample has a CVPixelBuffer. I have 2 questions regarding the pixelBuffer: I see that the buffer itself is read only but can I alter the bytes within this pixel buffer? Lets say change all green pixels to red (not my actual use case but just an example) Will the updated pixel buffer then be used in the passthrough screen? If not, then is there any way to have control over the video feed that is being displayed as passthrough? Our ideal setup would be to have access to a frame, alter it however we want, and then have the frame displayed in passthrough. I realize I could take the feed and copy it into a floating window and alter that, but that breaks the immersion we are shooting to create here. Thanks in advance!

I'm making an app that reads a ProRes file, processes each frame through metal to resize and scale it, then outputs a new ProRes file. In the future the app will support other codecs but for now just ProRes. I'm reading the ProRes 422 buffers in the kCVPixelFormatType_422YpCbCr16 pixel format. This is what's recommended by Apple in this video https://developer.apple.com/wwdc20/10090?time=599. When the MTLTexture is run through a metal performance shader, the colorspace seems to force RGB or is just not allowing yCbCr textures as the output is all green/purple. If you look at the render code, you will see there's a commented out block of code to just blit copy the outputTexture, if you perform the copy instead of the scaling through MPS, the output colorspace is fine. So it appears the issue is from Metal Performance Shaders. Side note - I noticed that when using this format, it brings in the YpCbCr texture as a single plane. I thought it's preferred to handle this as two separate planes? That said, if I have two separate planes, that makes my app more complicated as I would need to scale both planes or merge it to RGB. But I'm going for the most performance possible. A sample project can be found here: https://www.dropbox.com/scl/fo/jsfwh9euc2ns2o3bbmyhn/AIomDYRhxCPVaWw9XH-qaN0?rlkey=sp8g0sb86af1u44p3xy9qa3b9&dl=0 Inside the supporting files, there is a test movie. For ease, I would move this to somewhere easily accessible (i.e Desktop). Load and run the example project. Click 'Select Video' Select that video you placed on your desktop It will now output a new video next to the selected one, named "Output.mov" The new video should just be scaled at 50%, but the colorspace is all wrong. Below is a photo of before and after the metal performance shader.

1.In the FxRemoteWindowAPI protocol, there is no way to set window.frame.origin. 2.When using NSWindow, you cannot set [Window setLevel:NSFloatingWindowLevel]. 3.How can I keep the window in front of Final Cut Pro without affecting the normal use of Final Cut Pro?

How is it possible to enable EDR on Apple TV without AVFoundation for custom HDR video playback? The use case is a custom video player for HDR playback via VideoToolbox and Metal, which seem to render colors correctly on iOS but not on tvOS. All related documentation and WWDC sessions describe APIs that are unavailable for tvOS: let metalLayer = CAMetalLayer() metalLayer.wantsExtendedDynamicRangeContent = true metalLayer.edrMetadata = CAEDRMetadata.hdr10(minLuminance: 0.0, maxLuminance: 1000, opticalOutputScale: 100) What's the alternative path for tvOS to have correct system tone mapping for a setup like: metalLayer.pixelFormat = .rgba16Float // (or .bgr10_xr) metalLayer.colorspace = CGColorSpace(name: CGColorSpace.itur_2100_PQ) Video format: HEVC, YUV 4:2:0 10bit, BT.2020 PQ. We do set the preferredDisplayCriteria on AVDisplayManager and thus video range matching is in place. WWDC Ref: https://developer.apple.com/videos/play/wwdc2022/110565?time=557

I am have implemented PIP in my app. When user goes to background while video was playing. App opens PIP and everything works fine. But when user locks the device , PIP is not stopping/Pausing the video. Is there a way I can pause the Video when user locks the device?

I'm trying to secure my m3u8 streaming link with a token. To achieve this, I'm using AVAssetResourceLoaderDelegate in my SwiftUI app. However, the video doesn't play in AVPlayer when I'm using the AVAssetResourceLoaderDelegate. I can see that data is being received in the resourceLoader, but the player does not start playback. Here's the code I'm using: @State private var player: AVPlayer? @EnvironmentObject var pilot: UIPilot<AppRoute> var body: some View { VStack { VerticalSpacer(height: 50) HStack { Image(systemName: "arrow.left") .onTapGesture { pilot.pop() } Spacer() Text("liveStreamData.titleShort") .font(.poppins(.semibold, size: 18)) .lineLimit(1) HorizontalSpacer(width: 16) Spacer() } .padding(.horizontal) if let player = player { VideoPlayer(player: player) .onAppear { player.play() } .onDisappear { player.pause() } } else { Text("Loading video...") } } .onAppear { setupPlayer() } } private func setupPlayer() { guard let url = URL(string: "https://assets.afcdn.com/video49/20210722/v_645516.m3u8") else { print("Invalid URL") return } // Replace the scheme with a custom scheme var components = URLComponents(url: url, resolvingAgainstBaseURL: false) components?.scheme = "customscheme" // Change the scheme to a custom one guard let customURL = components?.url else { print("Failed to create custom URL") return } let asset = AVURLAsset(url: customURL) // Set the resource loader delegate let resourceLoaderDelegate = VideoResourceLoaderDelegate() asset.resourceLoader.setDelegate(resourceLoaderDelegate, queue: DispatchQueue.main) let playerItem = AVPlayerItem(asset: asset) player = AVPlayer(playerItem: playerItem) } } class VideoResourceLoaderDelegate: NSObject, AVAssetResourceLoaderDelegate { func resourceLoader(_ resourceLoader: AVAssetResourceLoader, shouldWaitForLoadingOfRequestedResource loadingRequest: AVAssetResourceLoadingRequest) -> Bool { guard let url = loadingRequest.request.url else { print("Invalid request URL") return false } // Replace the custom scheme with the original HTTP/HTTPS scheme var components = URLComponents(url: url, resolvingAgainstBaseURL: false) components?.scheme = "https" // Change the scheme back to HTTP/HTTPS guard let originalURL = components?.url else { print("Failed to convert URL back to HTTPS") return false } // Fetch the data from the original URL let urlSession = URLSession.shared let task = urlSession.dataTask(with: originalURL) { data, response, error in if let error = error { print("Error loading resource: \(error)") loadingRequest.finishLoading(with: error) return } if let data = data, let dataRequest = loadingRequest.dataRequest { print("Data loaded: \(data.count) bytes") dataRequest.respond(with: data) loadingRequest.finishLoading() } else { print("No data received") loadingRequest.finishLoading(with: NSError(domain: "VideoResourceLoader", code: -1, userInfo: nil)) } } task.resume() return true } func resourceLoader(_ resourceLoader: AVAssetResourceLoader, didCancel loadingRequest: AVAssetResourceLoadingRequest) { print("Loading request was canceled") } } Problem: The video does not play when using AVAssetResourceLoaderDelegate. The data is being loaded correctly as confirmed by the logs, but AVPlayer fails to start playback. Without the resource loader, the video plays without any issues. Question: What could be causing the player to not play the video when using AVAssetResourceLoaderDelegate? Are there any additional steps or configurations I need to ensure smooth playback while using a resource loader? Any help would be greatly appreciated!

I'm using the "Converting side-by-side 3D video to multiview HEVC and spatial video" sample code on iOS. It takes about 8 seconds to convert a 6-second video. At this rate, a 1-hour video would take 1.3 hours to convert. How can I speed up the conversion? BTW, are there solutions to convert side-by-side 3D video to spatial video for Windows?

I was trying to migrate Core Image based code that's rotating an image in a CVPixelBuffer to the newer VTPixelRotationSession from Video Toolbox. Hoping to increase performance. The original code does: let rotatedImage = CIImage(cvPixelBuffer: origPixelBuffer).oriented(.left) context.render(rotatedImage, to: newPixelBuffer) The new code uses a session: _ = VTPixelRotationSessionRotateImage(rotationSession, origPixelBuffer, newPixelBuffer) However I immediately ran into memory limitations, since my code has to be able to run in an iOS extension. It seems VTPixelRotationSessionRotateImage easily lets memory usage spike over the 50MB of allowed memory. While the CIImage based implementation has no such high memory usage at all. Is this expected? Does the VTPixelRotationSession implementation gain more performance by sacrificing memory? Or is there something I'm overlooking? I was expecting the VTPixelRotationSession at worst to be on par in terms of memory usage and processing speed compared to CIImage. At this moment it seems VTPixelRotationSession is unusable in extensions. See also Feedback: FB14977240